Add IPPROTO_IPIP compat definition to fix MinGW build

Signed-off-by: David Woodhouse <dwmw2@infradead.org>

diff --git a/openconnect-internal.h b/openconnect-internal.h
index 21bd8853c6cdeb137e6d73f498d74f466c7514d0..30c65848a10020c549d3bf5e00e271c038ed5e94 100644 (file)
--- a/openconnect-internal.h
+++ b/openconnect-internal.h
@@ -112,6 +112,12 @@
 #ifndef MIN
 #define MIN(x,y) ((x)<(y))?(x):(y)
 #endif
+
+/* At least MinGW headers seem not to provide IPPROTO_IPIP */
+#ifndef IPPROTO_IPIP
+#define IPPROTO_IPIP 0x04
+#endif
+
 /****************************************************************************/
 
 struct pkt {